Improvement in pressure-gauges



`it' forced upward by pressure, the conical steel cap c `if" `CHARLES LIEDKE, `0F SANDUSKY, OHIO.

Letters Patent No. 106,180, lated August 9, 1870.

IMPROVEMENT IN PREssUREGAUGEs-` The Schedule referred to in these Letters-Patent and-making part of the same.

Toi` all who-in ,muy concern` i i y Be itknowufthat I, Guantesr LIEDKE, of Sau'- dusky, in the county of' Erie and State'of O hio, have i minvented a new andirnproved Pressure-Gauge; and

`I do hereby declare that `the following is a full and exact description thereof, reference ,being had to the aocompanyinglrawingand tothe lettersoi. reference `markedthereon,` inakinga part of this. specification.

This invention relates to 4a new'and improved pres` 'i sure-gauge, andconsists in 'so constructing a gauge as to combiue'accuracy, strength, and economy.

i 'In theaccompauying drawingl i Figure/1'` represents a front view oi my gauge, with `the dialremoved, and ,i

1 .FigureZ asctional view of` the saine.

`liligure 3, a plainshowing end of plunger-pins und ehu-in.`

Similar letters of reference indicate corresponding parts luthe several figures.v Y

A.' n `the shellor case of` asteam-gauge, made of cast metal Aor other! material.

` This case is castwith a swell, B, on its lower ou ter "side, liuto] which` is tted the` hollow plunger C.

fOne' endet this plunger is provided with a delvible ange or diaphragm, u, and the4 other or upper end witba conical steeicap,vc.- 1 .cy i n i The plunger C, being placed withiufthe 'swell B, cx-V trends upward throughithe "case A`,`and -into a hollow i `cylinder, d, which is,screwedintosaidshell or box'.Y .Passing into 4th"eyliiuler Il," and` near its` base, are `three pins, ff1 fz, the innerpoints of' said pins being beveled insuchmanner asthat, when the plunger C,

of said plungerwill press against-the beveled points i of said pins, andforce themnoutward.

`Fixed to thecylinde'r d are three springs, It h? h2: i

These springs are secured to the cylinder, at their u )er ends bythe screws-'i 'i and their lower ends are P1 a g n 4confined by thespring ring k.

i To each of the springs h h1 h2 are fixed the small `rollers u, and around saidspringsaudrollers is passed the chain none ,endof said chain being fastened to the springs h hl ha'nd the other endto the lower arm orend of the lever fr, n 4 i i Also,vwithin the shell or box A are fixed by screws the `plates sand t, through lwhich passes the spindle ln.

vOnto the spindle e, and between the plates s end t, are attached the pulley-wheeler; and coiledf spring y,

and to the outer or projecting 4end of said spindle is'V affixed the hand or pointer E.

'lo the pulley-wheel w is attached one end of the chain e, the other end ot saidchaiu being fastened to the upper or longer arm of the lever fr.

Now it will be seen, from t-he constructiouof-this gauge, andA from the foregoing description, that, when the plunger G is forced upward by steam orfothelp..

pressure, the conical cap c, pressing against the hev' eled points of the pins]` f 1 fl, will force them outward, the plus inturn forcing VoutwardV the springs It lil h2, thus drawing or contract-ingthe chain 1J, which `in turndrawsin the lower end of the lever fr, and this causing the upper end of said lever to move outward, drawing with it the chain e, which causes the pulley- 'wto revolve, andwith it the spindle and hander pointer. E, and, in this way, as the hand or pointer is 'moved from point to pointof .the scale or index, the l increasing pressure 'is indicated, and, as thepressure is lessened, the hand or pointer lleturns or moves in the opposite direction by the action of the spiral,

spring y. v

i In order to prevent the'plunger being forced tooth'r upward, it is provided with the hangs or diaphragm u.

This flange or diaphragm is made of thin sheet-metal,

or other flexible material, so that, while it prevents.V

the plunger O-from being forced too far, yet it will yield more or less/to the pressure imparted to the plunger.

Having thus described my invention,

Y What I claim us new, and desire to secure byLetters Patent, yis- A pressure-gauge, composed of the plunger O, cylinder d, springs h h1 h2, spring ring k, rollers n., chain p, level' fr, chain e, pulley-wheel w, in combination with the spiral spring y, spindle e, and hand or pointer E, all constructed and arranged as and for the purposes hereinbeibre described. n

CHARLES LIEDKE.

y Witnesses:

j LoUIs TRAUB, lCONRAD TRAUB. 

